Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | /**
* @license Apache-2.0
*
* Copyright (c) 2025 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
var isNegativeZero = require( '@stdlib/math/base/assert/is-negative-zero' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
// MAIN //
/**
* Computes the mid-range of a strided array.
*
* @private
* @param {PositiveInteger} N - number of indexed elements
* @param {Object} x - input array object
* @param {Collection} x.data - input array data
* @param {Array<Function>} x.accessors - array element accessors
* @param {integer} strideX - strideX length
* @param {NonNegativeInteger} offsetX - starting index
* @returns {number} mid-range
*
* @example
* var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
* var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
*
* var x = toAccessorArray( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0 ] );
*
* var v = midrange( 4, arraylike2object( x ), 2, 1 );
* // returns 1.0
*/
function midrange( N, x, strideX, offsetX ) {
var xbuf;
var get;
var max;
var min;
var ix;
var v;
var i;
// Cache reference to array data:
xbuf = x.data;
// Cache a reference to the element accessor:
get = x.accessors[ 0 ];
if ( N === 1 || strideX === 0 ) {
v = get( xbuf, offsetX );
if ( isnan( v ) ) {
return NaN;
}
return v;
}
ix = offsetX;
min = get( xbuf, ix );
max = min;
for ( i = 1; i < N; i++ ) {
ix += strideX;
v = get( xbuf, ix );
if ( isnan( v ) ) {
return v;
}
if ( v < min || ( v === min && isNegativeZero( v ) ) ) {
min = v;
} else if ( v > max || ( v === max && isPositiveZero( v ) ) ) {
max = v;
}
}
return ( max + min ) / 2.0;
}
// EXPORTS //
module.exports = midrange;
|